Linked from
The 15 pages that link to Antarctic Circle, each with the reason it gives.
Circumpolar starRelated: High southern latitudes make more of the southern sky’s stars circumpolar.
SolsticeRelated: The June solstice brings continuous darkness within the circle.
December solsticeRelated: Areas south of it can experience continuous daylight around this solstice.
Queen Maud LandRelated: Queen Maud Land lies south of this latitude circle.